﻿<html>
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  <meta http-equiv="content-type" content="text/html; charset=UTF8">
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 <body>
  <canvas id="c" width="800" height="600">canvas not supported</canvas>
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   var c = document.getElementById("c");
   var ctx =  c.getContext("2d");

     ctx.fillStyle="#0000FF"
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ctx.beginPath();
ctx.moveTo(50, 0);
ctx.lineTo(50, c.height);
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ctx.closePath();

ctx.beginPath();
ctx.moveTo(0, 200);
ctx.lineTo(c.width, 200);
ctx.stroke();
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</html>